Per Nick Caputo: Thor is repositioned and Asgardians altered, likely by John Romita and John Verpoorten. Original stat of cover was discussed here:
Page 2, panels 2-4 of page 5, page 6, and panel 6 of page 7 is not reprinted in the Marvel Spectacular (Marvel, 1973 series) #19 reprint.
Origin of the Inhumans Part 3.
Letters from: Rick Wood, Michael Cornell, the Whiz Book Store, and Richard Paulenich.